/*
 * $Id: QEUidNameTransformer.m 39 2009-04-28 13:40:50Z jon@bway.net $
 * Chalk
 *
 * Created 4/27/09
 * Copyright Jon Gordon
 * 
 * Permission is hereby granted, free of charge, to any person obtaining 
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including 
 * without limitation the rights to use, copy, modify, merge, publish, 
 * distribute, sublicense, and/or sell copies of the Software, and to 
 * permit persons to whom the Software is furnished to do so, subject to 
 * the following conditions:
 * 
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#import "QEUidNameTransformer.h"


@implementation QEUidNameTransformer

- (id)init
{
    NSLog(@"MESSAGE: %s", __PRETTY_FUNCTION__);
    return [self initWithTable:nil];
} // init

- (id)initWithTable:(NSSet *)newTable
{
    NSLog(@"MESSAGE: %s", __PRETTY_FUNCTION__);
    self = [super init];
    if (nil != self) {
        if (nil == newTable) {
            table = nil;
            indexByUid = nil;
            indexByName = nil;
        } else {
            NSMutableDictionary *tmpByUid;
            NSMutableDictionary *tmpByName;
            
            table = [[NSSet alloc] initWithSet:newTable];
            tmpByUid = [NSMutableDictionary dictionaryWithCapacity:[table count]];
            tmpByName = [NSMutableDictionary dictionaryWithCapacity:[table count]];
            
            for (id obj in table) {
                [tmpByUid setObject:obj forKey:[obj valueForKey:@"uid"]];
                [tmpByName setObject:obj forKey:[obj valueForKey:@"name"]];
            } // for
            
            // replace with immutable versions
            indexByUid = [[NSDictionary alloc] initWithDictionary:tmpByUid];
            indexByName = [[NSDictionary alloc] initWithDictionary:tmpByName];
        } // else
    } // if
    return self;
} // initWithTable:andReversible:

- (void)dealloc
{
    NSLog(@"MESSAGE: %s", __PRETTY_FUNCTION__);
    [table release];
    [indexByUid release];
    [indexByName release];
    
    [super dealloc];
} // dealloc


+ (BOOL)allowsReverseTransformation {
    NSLog(@"MESSAGE: %s", __PRETTY_FUNCTION__);
    return YES;
} // allowsReverseTransformation

- (id)transformedValue:(id)value
{
    NSLog(@"MESSAGE: %s", __PRETTY_FUNCTION__);
    NSAssert(nil != value, @"QEUidNameTransformer cannot transform nil value");
    id result = [indexByUid objectForKey:value];
    NSAssert1(nil != result, @"QEUidNameTransformer instance has no entry for UID %@", value);
    return result;
} // transformedValue:

- (id)reverseTransformedValue:(id)value
{
    NSLog(@"MESSAGE: %s", __PRETTY_FUNCTION__);
    NSAssert(nil != value, @"QEUidNameTransformer cannot reverse transform nil name");
    id result = [indexByName objectForKey:value];
    NSAssert1(nil != result, @"QEUidNameTransformer instance has no entry for name \"%@\"", value);
    return result;
} // reverseTransformedValue:
@end
